this is downtown san francisco. if you think the fog is bad here look to the north bay with visibility down to zero for santa rosa and about. we have seen for nowt is up to 2 mi.. the fog is now dense and the delta and is down to zero. the good news is not impacting sfo there have been no flight delays thus far. 10 mi. it's clear conditions for the rest of the bay area. keeping an eye on cold front and pressure will drop down into our area. first we will see an increasing cloud cover and later on tonight some rain. very light and nature and you can see by 9:00 p.m. some sprinkles north of the golden gate bridge. this will continue to pass, it will not sought out like some of the systems we saw last week. it will continue with this pushed south with light rain in our area. scattered showers on the back and. expected rains no mix in the sierra and a winter weather advisory is in a fax 4 to 8 in. between 4,500 ft.. you will need your chance for highway 50. afternoon highs in the bay area 64 vallejo and concord 61 in oa